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CVE-2023-21839

98
FAUCET Score

CVE-2023-21839 is an easily exploitable vulnerability in Oracle WebLogic Server (versions 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0) affecting its Core component. With a CVSS score of 7.5 (High), unauthenticated attackers can gain unauthorized access to critical or all accessible data via network access using T3 or IIOP protocols, with no user interaction required. This vulnerability is actively exploited in the wild, as confirmed by CISA, and has a Metasploit module available for remote command execution. It has garnered significant community discussion and media coverage, indicating widespread awareness and concern.

Impacted Technologies

VendorProductVersion(s)CPE
12.2.1.3.0CPE matchmatch criteria
cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*
12.2.1.4.0CPE matchmatch criteria
cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*
14.1.1.0.0CPE matchmatch criteria
cpe:2.3:a:oracle:weblogic_server:14.1.1.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.81%
Probability of exploitation in next 30 days
EPSS Percentile
100.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · May 1, 2023
Metasploit: Oracle Weblogic PreAuth Remote Command Execution via ForeignOpaqueReference IIOP Deserialization · Jan 17, 2023
Nuclei: CVE-2023-21839 · Oct 10, 2025
This CVE's current EPSS score of 0.9981 is in the 100th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

oraclepatch availablevia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.html
ExploitThird Party AdvisoryVDB Entry
oracle.com / security-alerts/cpujan2023.html
PatchVendor Advisory